BBC: Russia and Norway have signed an Arctic border agreement, ending a 40-year dispute over an area in the Barents Sea that contains potentially huge oil and gas reserves. The two countries have decided to divide a 175,000 square kilometres (67,000 sq miles) disputed area, half the size of Germany, to the north off their coastlines. Within the area, a 67,100 sq km area known as the “loophole” has been a source of conflict between the two nations because of unregulated fishing, and …